Those black spots in the blue stuff...mmm...Souls...
Are supposed to be mouths/eyes, like faces?
Try to define the faces more, like making some colour differences in the souls being eaten, and try to make like... Faint shapes of heads. Like...err... Really distorted skulls seeping into the monster's mouth.

Uhm, I hope you get me. Although I don't expect you to. That was some hell of a bad explanation. 0.o
Sorry, it's kind of hard to explain.
Plus, the monster thingie could use some work. Try to make it look more ferocious, and less like a purple blob with square teeth.
Right now, 3/5
Useful
If you could define the faces/heads/skulls/what-the-hell-ever souls, and improve the blob-ish beast, it would surely qualify for 4/5 or 5/5.
Keep up the good work
EDIT: I just found out exactly what the monster looks like atm. A purple pac-man!
EDIT2: Like TheHunterKiller said, the colour scheme is GREAT! And therefore, I'd like to warn you about my suggestion. If you decide to make colour differences in the flowing souls, make sure the colours match. Like... Don't start mixing in green or red stuff. It would look horrible. At least that's what I think. (I was thinking some purple, perhaps ;P )
EDIT3: First of all, what's with all these edits? -.- Anyways, I'd like to say that I hope nothing of what I stated above seems ironic or sarcastic or condescending. By all means, I don't mean to, in any way, humiliate or offend you. Every word is typed with good intentions.

+ Apologies for the long post. Nobody likes such a big bunch of letters. At least I don't ^^